Lhasa

Lhasa sits at about 3,650 m; on the first day avoid strenuous exercise and alcohol, drink water and eat light meals — most discomfort eases within a day or two.

Two to three days in Lhasa, three to four days towards Shigatse, three to five days towards Nyingchi and one to two days at Namtso; combine them according to your available days and how well you are adapting to the altitude.